Proxy Academy

To configure a proxy on your MikroTik router, you need the Winbox software. The following steps must be done in the application: Open the "IP"-"WebProxy" sections. Check the box next to "Enabled". Enter the parameters of the proxy-server.

After that you have to specify the data of the proxy in the browser to be used. As an example, let's take Google Chrome. What you need to do:

Open the browser.
Click on the icon "?" in the upper right corner.
Go to "Settings".
Select the "Advanced" option.
Click the "System" tab.
Click on "Open proxy settings for your computer".
Click on "Network settings".
Activate the "Use proxy server" option.
In the tab that opens, specify the IP address of the proxy server. You should enter it in the field of the protocol to which the proxy server belongs.
Click the "OK" button to save your settings.

To realize receiving and transmitting UDP packets in different threads for parallel work in Java, you can use the DatagramSocket class along with the Thread class to create separate threads for receiving and transmitting. Here's an example of a simple UDP server that handles receiving and transmitting in different threads:

import java.net.*;
import java.io.*;

public class ParallelUDPServer {
    private static final int PORT = 12345;

    public static void main(String[] args) throws IOException {
        // Create a DatagramSocket for receiving UDP packets
        DatagramSocket receiveSocket = new DatagramSocket(PORT);

        // Create a thread for receiving UDP packets
        Thread receiveThread = new Thread(() -> {
            byte[] receiveBuffer = new byte[1024];
            while (true) {
                DatagramPacket receivePacket = new DatagramPacket(receiveBuffer, receiveBuffer.length);
                try {
                    receiveSocket.receive(receivePacket);
                    processReceivePacket(receivePacket);
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });

        // Create a thread for transmitting UDP packets
        Thread transmitThread = new Thread(() -> {
            while (true) {
                // Simulate sending UDP packets to a client
                sendUDPPacket("Hello from the server!", "127.0.0.1", 6789);
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        });

        // Start the threads
        receiveThread.start();
        transmitThread.start();
    }

    private static void processReceivePacket(DatagramPacket packet) {
        byte[] data = packet.getData();
        int length = packet.getLength();
        InetAddress address = packet.getAddress();
        int port = packet.getPort();

        System.out.println("Received packet:");
        for (int i = 0; i < length; i++) {
            System.out.print(data[i] + " ");
        }
        System.out.println();
        System.out.println("From: " + address + ":" + port);
    }

    private static void sendUDPPacket(String message, String host, int port) throws IOException {
        byte[] sendData = message.getBytes();
        DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, InetAddress.getByName(host), port);
        DatagramSocket socket = new DatagramSocket();
        socket.send(sendPacket);
        socket.close();
    }
}

In this example, the ParallelUDPServer class creates two threads: one for receiving UDP packets (receiveThread) and another for transmitting UDP packets (transmitThread).

To connect to the Internet through a proxy server, you need to configure your device to use the proxy server for your network connections. Here's how to do it for different operating systems:

For Windows:

1. Press the Windows key + R to open the Run dialog.
2. Type "inetcpl" (without quotes) and press Enter. This will open the Internet Properties window.
3. Click on the "Connections" tab.
4. Click on "LAN settings" in the bottom right corner.
5. In the "Proxy Server" section, select "Use a proxy server for your LAN" and enter the proxy server address and port number provided by your network administrator or proxy service.
6. Click "OK" and close the Internet Properties window.

For macOS:

1. Open System Preferences.
2. Click on "Network".
3. Select the network connection you are using (e.g., Wi-Fi, Ethernet).
4. Click on the "Proxy" tab.
5. Select "Web Proxy (HTTP)" from the "Proxy Settings" dropdown menu.
6. Enter the proxy server address and port number provided by your network administrator or proxy service.
7. Click "OK" and close the Network preferences.

Several virtual proxy servers can be created within one device. These are special dedicated servers that only "service" such traffic. Many devices can connect to them at the same time.

Create the first profile by specifying its name and selecting the desired configuration. The configuration is a non-repeating combination of different versions of the operating system and browser. After setting the language, open the "Network" tab and select the type of proxy (socks5 or https). Now it remains only to fill in the data in the highlighted fields to complete the installation of the proxy.